Heating system



June 13, 1939, J". Pv, KRIECHBAUM Filei Bepi JOM P Kfeckzmm Patented June 13, 1939 UNITED STATES PATENT OFFICE HEATING SYSTEM oi' Delaware Application september 24, 193s, serial No. 102,334

11 Claims.

'Ihis invention relates to heating systems and more particularly to a typeof system wherein radiators or-analogous devices are heated by a circulating fluid and wherein hot water is available for domestic purposes at all times.

One object of this invention is the provision, in an improved heating system of the character to he hereinafter described incorporating mechanism for accelerating the circulation of iluid to the radiators or analogous devices, of means to preclude the circulation of cold fluid.

An additional object is the provision in a systemof the character to be described including a circulator ofmeans to`A preclude the energization of the circulator until the fluid adapted to 'be circulated to the radiators has reached a predetermined temperature.

A more specific object is the provision, in a combined heating system of the hot water type including a circulator to increase the rapidity of flow of the heated water through the system of means controlled by boiler pressure or temperature to energize and/or deenergize the circulator g in such manner that water below a predetermined temperature cannot be forced through the system by the action of the circulator.

i A further specic object resides in the provision in a heating system of that type including means for ensuring a constant supply of hot water s0 for domestic purposes of means controlled by boiler pressure or temperature to preclude the circulation of cool or cold water through the radiators of the house heating system.

Other objects will in part be obvious and in 35 part pointed out hereinafter.

The invention accordingly, consists in the combination and arrangement of elements all as will be more fully pointed out hereinafter and disclosed in the accompanying drawing and the '40 scope of the application of which will be indicated by the appended claims.

The single ligure of the drawing, wherein is shown an illustrative embodiment of the invention, is a schematic diagram disclosing a heating i system incorporating the features of the instant invention.

For a more complete understanding of the invention, reference is now made to the drawing wherein a boiler I0 adapted to -be filled with water to a i'lxed level II contains a coil I2 from which a riser I3 leads through a conventional pipe arrangement to radiators I4 from which in turn a return line I5 leads back to coil I2. Radiacors I4 are provided with conventional venting 55 orifices Ila. A circulator I6 of any desired type (c1. zar-'8) is shown as-\positioned in return line I5 as is a conventional check valve I1 adapted to preclude thermal circulation of water through the system in the absence of acceleration by circulator I6. It will, of course, be understoodV that while circulator I6 and valve I] are shown as positioned in return line I5, they may be equally as well placed in any other desirable portion of the system. A pair of pipes I8 and 20 connected to boiler I0 below the water level II lead to a tank I9 wherein is positioned a heating coil 2I having an inlet pipe 22 and an outlet pipe 23. Water is ysupplied through pipe 22 from any suitable source and pipe 23 leads to faucets or analogous fixtures to provide hot water for domestic purposes. In the particular type of'system disclosed in the accompanying drawing, water in boiler I0 is heated by means of a burner 24 of any suitable type and circulates thermally through pipes I8 and 29 and tank I9 to impart heat to water in coil 2|.

When it is desired to supply heat to radiators I4, the temperature of the water in boiler I0 is increased until steam is formed in the space adjacent coil I2, which steam in turn impartsheat to the water in the closed system comprised of coil I2, riser I3, radiators I4 and return line I5. After the water in this closed system has been heated to a sufficient degree to heat the space in which radiators Il are positioned, circulator I6 is energized to provide forced circulation of the water through the circuit above mentioned.

Suitable control means to be hereinafter described are provided whereby the temperature of the water below water level I I is maintained constantly at a temperature suilicient to supply adequate hot water for domestic use. When it is desired to heat the space acUacent radiators I4, burner 2| is further energized and the. temperature of the water is increased until steam forms in the manner above described.

The system is primarily under the control of a thermostat 25 which carries a pair of contacts 26 and 21 adapted to engage contacts 28 and 29 and has at its extremity opposite the contacts 26 and 21 a terminal 30. Contacts 26 and 28 are so positioned as to make and break at a slightly lower temperature than contacts 2l and 29 for a purpose to be described hereinafter. From contact 29, a wire 3| leads to the secondary 32 of a step-down transformer, generally indicated at 33, which also has a primary 3l to which power is supplied from line wires 35 and 36 leading from some source of power (not shown). From the opposite side of transformer secondary made of the embodiment herein shown and described, it is to be understood that all matter hereinbefore set out or shown in the accompany- "ing drawing is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention: 1. In ai heating system in combination, a boiler, water in said boiler, a burner to heat said riser and return line, a tank, a coil in said tank for heating domestic hot water,.pipes from said tank to said boiler, means responsive to boiler temperature for controlling said burner to mainJ tain said water in said boiler at a substantially y water in said boiler, a burner to heat said water,`

. water therein, means for energizing said circu-` constant temperature below the boiling point, a room thermostat adapted to energize said burner to generate steam to heat said first mentioned coil and hence said water therein, means responsive to steam pressure in said boiler and a call for heat by said room thermostat to energize said circulator, the arrangement being such that said circulator cannot be energized upon a call ior heat by said room thermostat until a predetermined steam pressure in said boiler is achieved, and second means responsive to steam pressure in said boiler to positively deenergize said burner, said secondmeans adapted to respond to a higher boiler pressure thansaid iirst mentioned pressure responsive means.

2. In a heating system in combination, a boiler, water in said boiler, a burner to heat said water, a coil in said boiler adapted to be heated by steam from isaid water in said boiler, radiators, a riser from said coil to said radiators,r a return line from said radiators to said coil, a circulator in said return line, water in said coil, radiators, riser and return line, a tank, a coil in said tank for heating domestic hot water, pipes from said tank to said boiler, means responsive to boiler temf perature for controllingA said burner to maintain said water in said boiler at a substantially constant temperature below the boiling point, a room thermostat adapted to energize said burner to generate steam to heat said ilrst mentioned coil and hence said water therein, and means responsive to steam pressure in lsaid boiler and a call for heat by said room thermostat to energize said circulator, the arrangement being such that said circulator cannot be energized upon a call for heat by said room thermostat until a predetermined steam pressure in-said boiler is achieved.

3. In a-heating system in combination, a boiler,

a coil in said boiler adapted to be heated by steam from said water in said boiler, radiators, a supply line from said coil to said radiators, a return line from said radiators to said coil. a circulator in one of said lines, a check valve in one of said lines, water in said coil, radiators, supply line and return line, a tank, a coil in said tank i'or heating domestic hot water, pipes from said tank to said boiler, means responsive to boiler temperature -for controlling said burner to maintain said water in said boiler at a constant relatively high temperature, a .room thermostat adaptedto energize said burner to generate steam to heat said ilrst mentioned coil and hence said latorjlmeans responsive to steam pressure in said boiler preventing `energization of said circulator by said last mentioned means, until a predetermined steam pressure in said boiler is achieved, and secondmeans responsive to steam` pressure in said boiler to positively deenergize said burner, said second pressure responsive means adaptedto respond to a higher boiler pressure than said iirst mentioned pressure responsive means.

4. In a heating system in combination, a boiler, iluid in said boiler, a burner to heat said uid, a coil in said boiler adapted to be heated by steam from said iluid in said boiler, radiators for heating a space, pipes connecting said radiators to said coil, a circulator in one of said pipes, uid in said coil, pipes and radiators, a source of domestic hot water supply, means connecting saidl source to said boilerwhereby fluid in said boiler heats said domestic hot water supply, means responsive to boiler temperature to maintain said fluid in said boiler at a relatively constant high temperature to impart heat to said source at all times, means responsive to the temperature of said space to energize said burner to generate steam to heat said first mentioned coil and hence said water therein, means for energizing, said circulator, means responsive to steam pressure in said boiler for preventing energizati'on of said circulatorl until a predetermined steam pressure in said boiler is achieved, and second means responsive to steam pressure in said boiler to positively deenergize said 'bumer, said `second pressure responsive, means adapted to respond to a higher boiler pressure than said ilrst mentioned pressure responsive means.

5. In a heating system in combination, a boiler, water in said boiler, a burner to heat said water, a coil in said boiler above the water and adapted to be heated by steam from said water, radiators, supply and return pipes connecting said radiators to said coil, a heating medium in said coil, radiators, and pipes, a circulator in one of said pipes, a

tank, a coil insaid tank for heating domestic hot water, pipes connecting said tank to said boiler below the water line, means responsive to boiler 'water temperature for lcontrolling said burner to maintain said water at a relatively high temperature below the boiling point, means responsive to room temperature, a circuit for said burner, a' circuit for said circulator, said last mentioned means closing a switch in'each circuit on a call for heat.

6. In a heating system in combination, a boiler, water in said boiler, a burner to'heat said water, a coil in said boiler above the water and adapted to be heated by steam from said water, radiators,

supply and return pipes connecting said radiato boiler water temperature for controlling said I burner to maintain said water at a relatively high temperature below the boiling point, means responsive to room temperature, a circuit for said burner, a circuit for said circulator, said last mentioned means closing a switch in each circuit on a call for heat, and means for opening the circuit to the burner when the steam pressure in the boiler rises beyond a predetermined degree.

7. In a heating system in combination, a boiler, water in said boiler, a burner to heat said water, a coil in said boiler above the water and adapted to be heated by steam from said water, radiators, supply and return pipes connecting said radiators to said coil, a heating medium in said coil, radiators, and pipes, a circulator in oneoi' said' pipes,

Aa circuit for controlling said burner, a circuit for vtors to said coil, a heating medium in said coil,

radiators, and pipes, a circulator in one of said pipes, a circuit for centrciling'said burner., a circuit for controlling said circulator, means responsive to room temperature, means operated by said room temperature responsive means for closing a switch in each ci said circuits, and means responsive to the steam pressure within said boiler for deenerm'zing said burner when said steam pressure risesbeyond a predetermined degree.

9. In a heating system in combination, a boiler, water in said boiler, a burner to heat said water, a 4coil in said boiler above the water and adapted to be heated by steam from said water, radiators, supply and return pipesconnecting said radiators to said coil, a heating medium in said coil, radiators, and pipes, a circulator in one of said pipes, a circuit for controlling said burner, a circuit for controlling said ciroulator, means responsive to room-temperature, means operated by said 'room temperature responsive means for closing a switch Yin each of said circuits, means responsive to thel steam pressure Within ysaid boiler for preventing energiz'ation of said circulator until said steam pressure is above a predetermined amount, and means. responsive to the steam pressurecwithin said boiler for deenergiizng said burner when said steam pressure rises beyond a predetermined degree. f

' l0. In a heating system in combination, a boiler, water in said boiler, a 4burner to heat said Water, a coil in said boiler above the water and adapted to be heated by steam from said water, radiators. supply and return pipes connecting said radiators to said coil, a heating medium in said coil, radiators, and pipes, a circulator in one of said pipes, a circuit for said burner, a circuit for said circulator, a room thermostat, means opcrateri by said thermostat for closing a switch in each circuit, and means responsive to boiler water temperature for energizing said burner independently ci said room thermostat to maintainsaid boiler water above a relatively high value less than the boiling point.

il. lin a heating system in combination, a boiler, water in said boiler, a burner to heat said Water, a coil in said boiler above the water and adapted to be heated by steam from said water', radiators, supply and return pipes connecting said radiators to said coil, a heating medium in said coil, radiators, and pipes, a oirculator in one of said pipa, a circuit for said burner, a circuit for said circulator, a room thermostat, means operated by said thermostat for closing a switch in,

each circuit, means responsive to boiler water temperature for energizing said burner indepenently of said room thermostat to maintain said 'boiler water above a relatively high value less than the boiling point, and means for deenergizing said burner when the steam pressure within the boiler exceeds a predetermined high value.

JOHN P. KRIECHZBAUM. 

